Looking over this... I feel like it's kinda missing what DD's stress system is for? I think a better take on it would be something like...

  • The game normally uses the normal resting rules, but stress recovery works off of the Gritty Realism rules.
  • Instead of having "stress hit dice", you get to roll a number of dice based off how comfortable and safe your long rest is. A cold hole in the middle of nowhere? No stress recovery dice. A warm, cheery fire while you all swap stories and sing along with the bard? You get some dice to roll.
  • When you drop to 0 stress, make a "stress save" while you panic and have a nervous breakdown. Fail three stress saves? You have a heart attack and die. Succeed on three stress saves? You go back up to 1 Stress. Crit on a stress save? Go back up to half stress.